"The empire has created a real killing machine made up not only of the CIA and its methods," the Cuban leader wrote in the latest of his nearly daily essays, published Sunday in the Communist Youth newspaper Juventud Rebelde.

President Bush "has constructed powerful and expensive superstructures of intelligence ... that lead to war, injustice, hunger and death everywhere on the planet," Castro wrote.

CIA documents made public last week described the agency's recruitment of a former FBI agent in August 1960 to use mobsters and poison pills to kill Castro. Information about the plot was among hundreds of pages of CIA internal reports, known as "the family jewels."